Take each one individually, detach the sections of tubing and slide elements in with the aid of an MFJ analyzer. Do this up on a tower.
Phase as you would any typical 50-ohm antenna. Space them around .85 wavelength center-to-center. Get a 1/4 wavelength of 35-ohm coax to make the phasing section. The 50-ohm cables to the individual antennas need to be the same length, come to a tee, then from the tee to the 1/4 wave section, then to 50-ohm cable. Chuck WB2EDV ----- Original Message ----- From: "tahrens301" <[email protected]> To: <[email protected]> Sent: Wednesday, April 07, 2010 12:09 PM Subject: [Repeater-Builder] DB-225 > Hi Folks, > > I picked up 3 DB-225 elements yesterday, but > can't find any information on them on RB. > > They are currently tuned for 47.1, and I'd like > to take them to 53.15. > > Anybody have any info on them, or how I could > phase 2 of them on the side of the tower? > > Thanks, > > Tim > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.800 / Virus Database: 271.1.1/2796 - Release Date: 04/07/10 02:32:00
